Ratios Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

Front

How do you write the ratio of boys to girls if there are 4 boys and 5 girls?

Back

The ratio of boys to girls is written as 4:5.

Front

If there are 20 girls in Leah's grade and the ratio of boys to girls is 4:5, how many boys are there?

Back

There are 16 boys in Leah's grade.

Front

What is the ratio of sopranos to all singers if there are 11 sopranos and 7 altos?

Back

The ratio of sopranos to all singers is 11:18.

Front

What happens to the ratio if you subtract the same number from both parts?

Back

Subtracting the same number from both parts of a ratio does not create an equivalent ratio.

Front

Complete the equivalent ratio for 4:12: ____:6

Back

The number that completes the equivalent ratio is 2.

Front

Complete the equivalent ratio for 4:12: ____:36

Back

The number that completes the equivalent ratio is 12.

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that expresses the same relationship between two quantities, even if the numbers are different.

Front

If the ratio of cats to dogs is 3:4, how many cats are there if there are 12 dogs?

Back

There are 9 cats.

Front

How do you find an equivalent ratio?

Back

To find an equivalent ratio, you can multiply or divide both parts of the ratio by the same non-zero number.